John Curl's Blowtorch preamplifier part II - Page 3706 - diyAudio
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Old 21st March 2013, 08:54 PM   #37051
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We have the same problem today, bcarso. '-)
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Old 21st March 2013, 08:55 PM   #37052
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You are still naive, Kindhornman, you think that this is a level playing field. It is not.
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Old 21st March 2013, 08:59 PM   #37053
qusp is offline qusp  Australia
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theres that victim again...
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Old 21st March 2013, 09:02 PM   #37054
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Quote:
Originally Posted by scott wurcer View Post
If you're doing any museum quality restoration these folks have many hard to find things.

Dyes - Kremer Pigments Inc.
Whoa. I've absolutely no idea what I was looking at there. I was looking in Klingspor's catalog, thinkin maybe "dark brown" or "ebony"...Kremer goes through all them chemical sounding names, I've no clue what they are..

29th street near 7th...sheesh, I'm gonna be at 1st and 72nd tomorrow...so close but yet so far..

I'll tell the museum people about that site, they may be able to use some of the stuff.

thanks again.

John
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Old 21st March 2013, 09:03 PM   #37055
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John,
Of course it is not a level playing field. We have amateurs such as myself on the electronic side and professionals that have experience far beyond audio electronics. It is always hard to have a conversation in that regards. It would be like me sitting in on a class on nuclear physics, I would not be able to contribute to the conversation or understand what is said. It is when someone like that starts to argue about something they know nothing about when it is really silly. But fill a room with like minded or educated minds and you will still get much disagreement on any subject. I am not that naive, just more pragmatic in how I look at something and willing to say I don't know.
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Old 21st March 2013, 09:03 PM   #37056
bcarso is offline bcarso  United States
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Quote:
Originally Posted by SY View Post
http://www.capatcolumbia.com/reading...in%20Crank.pdf

I'll save you a few clicks.

These days, there's always ArXiv.
Thanks---ah yes I have that book, must have at least skimmed that chapter Bernstein is a good writer on physics. Oddly, he also wrote a eulogistic piece about Brubeck recently.
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Old 21st March 2013, 09:16 PM   #37057
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Well back to audio.

Attached is my 50 ohm load from a CT 24V transformer. I used four 4700 uF capacitors and three 1 ohm resistors. It went from all the capacitors in parallel to a four stage CRCRCRC filter. As a CRCRC filter it did not seem to matter where the 9400 uF was positioned. Of course the four stage filter was the best. Total voltage loss was 6%. So the conclusion seems to be calculated what the worst case into the filter will be and the minimum you need out of it and use a three or four stage filter that uses up the voltage.

ES
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File Type: jpg 4 Stages by Stage.JPG (99.8 KB, 146 views)
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Old 21st March 2013, 09:25 PM   #37058
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Quote:
Originally Posted by jneutron View Post
Who
I'll tell the museum people about that site, they may be able to use some of the stuff.

thanks again.

John
You should see my mineral color set from China, the names are all in Chinese with colloquial names for the colors, "big red", "star blue". At least you can be sure the vermilion is mercuric sulfide.
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Old 21st March 2013, 09:29 PM   #37059
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That's me, talking about things that I don't know anything about. '-)
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Old 21st March 2013, 09:35 PM   #37060
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Quote:
Originally Posted by scott wurcer View Post
You should see my mineral color set from China, the names are all in Chinese with colloquial names for the colors, "big red", "star blue". At least you can be sure the vermilion is mercuric sulfide.
Sounds dangerous to me. Looks like I'm gonna need a chemist to explain all these compounds to me so I don't kill mself.

Where the heck am I gonna find a chemist around here???

specially an OLD one..

jn

ps..my favorite beverage name in Beijing was "40 degree"

Last edited by jneutron; 21st March 2013 at 09:39 PM.
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